No, 2 and 10 are factors of 20. The LCM of 2 and 10 is 10.
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No. If two numbers have an even factor in common, they are even numbers. Two even numbers will have an even LCM.
HCF means the highest common factor of two or more numbers. LCM means the lowest common multiple of two or more numbers.
It's kind of an inverse relationship. The product of the GCF and LCM of two numbers is the same as the product of the original two numbers, so as the GCF increases, the LCM decreases and vice versa. LCM is divisable by HCF.
You need at least two numbers to find either of those.
9
They are: h.c.f or HCF means the highest common factor of two or more whole numbers and l.c.m or LCM means the lowest common multiple of two or more whole numbers